Both forms use 4 US liquid quarts = 1 US liquid gallon. Quarts to gallons defaults to dividing quarts by 4. Gallons to quarts defaults to multiplying gallons by 4. Each has a direction selector and conditional source field.
| Quarts to gallons | Gallons to quarts | |
|---|---|---|
| Default | 4 qt → 1 gal | 1 gal → 4.0000 qt |
| Primary precision | Up to 4 decimals | Exactly 4 decimals |
| Default-direction details | Entered quarts, factor, pints | Gallons, pints, cups |
| Reverse details | Entered gallons, factor, pints | Quarts, pints, liters |
For a worked quart total, 18 qt ÷ 4 = 4.5 gal, with 36 pints. For a worked gallon amount, 2.75 gal × 4 = 11.0000 qt, with 22 pints and 44 cups. Those are examples, not the initial form values.
In the first form’s reverse mode, enter gallons and multiply by 4. In the second form’s reverse mode, enter quarts and divide by 4; the supporting liter row uses the same volume expressed in liters.
Limits
Use the US liquid definitions named by these forms, rather than substituting imperial or dry measures. The factor is exact within the stated system, but displays and Copy text round. Unit conversion does not determine mass, coating coverage, usable container space or a treatment quantity.
Sources
NIST SP 811, unit definitions and Appendix B factors. The paired calculator controls and rounding described above are their current form behavior. NIST Handbook 44, Appendix C, customary unit relationships.